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PERLMACHTEN(1)	       Perl Programmers Reference Guide		PERLMACHTEN(1)

NAME
       README.machten - Perl version 5 on Power MachTen systems

DESCRIPTION
       This document describes how to build Perl 5 on Power MachTen systems,
       and discusses a few wrinkles in the implementation.

   Perl version 5.8.x and greater not supported
       Power MachTen is not supported by versions of Perl later than 5.6.x.
       If you wish to build a version from the 5.6 track, please obtain a
       source distribution from the archive at <http://cpan.org/src/5.0/> and
       follow the instructions in its README.machten file.

       MachTen is no longer supported by its developers, Tenon Intersystems.
       A UNIX environment hosted on Mac OS Classic, MachTen has been
       superseded by Mac OS X and by BSD and Linux implementations for
       Macintosh hardware.  The final version of Power MachTen, 4.1.4, lacks
       many features found in modern implementations of UNIX, and has a number
       of bugs.	 These shortcomings prevent recent versions of Perl from being
       able to use extensions on MachTen, and cause numerous test suite
       failures in the perl core.

       In September 2003, a discussion on the MachTen mailing list determined
       that there was no interest in making a later version of Perl build
       successfully on MachTen.	 Consequently, support for building Perl under
       MachTen has been suppressed in Perl distributions published after
       February 2004.  The hints file, hints/machten.sh, remains a part of the
       distributions for reference purposes.

   Compiling Perl 5.6.x on MachTen
       To compile perl 5.6.x under MachTen 4.1.4 (and probably earlier
       versions):

	 ./Configure -de
	 make
	 make test
	 make install

       This builds and installs a statically-linked perl; MachTen's dynamic
       linking facilities are not adequate to support Perl's use of
       dynamically linked libraries.  (See hints/machten.sh for more
       information.)

       You should have at least 32 megabytes of free memory on your system
       before running the "make" command.

       For much more information on building perl -- for example, on how to
       change the default installation directory -- see INSTALL.

   Failures during "make test" on MachTen
       op/lexassign.t
	   This test may fail when first run after building perl.  It does not
	   fail subsequently.  The cause is unknown.

       pragma/warnings.t
	   Test 257 fails due to a failure to warn about attempts to read from
	   a filehandle which is a duplicate of stdout when stdout is attached
	   to a pipe.  The output of the test contains a block comment which
	   discusses a different failure, not applicable to MachTen.

	   The root of the problem is that Machten does not assign a file type
	   to either end of a pipe (see stat), resulting, among other things
	   in Perl's "-p" test failing on file descriptors belonging to pipes.
	   As a result, perl becomes confused, and the test for reading from a
	   write-only file fails.  I am reluctant to patch perl to get around
	   this, as it's clearly an OS bug (about which Tenon has been
	   informed), and limited in its effect on practical Perl programs.

   Building external modules on MachTen
       To add an external module to perl, build in the normal way, which is
       documented in ExtUtils::MakeMaker, or which can be driven automatically
       by the CPAN module (see CPAN), which is part of the standard
       distribution.  If you want to install a module which contains XS code
       (C or C++ source which compiles to object code for linking with perl),
       you will have to replace your perl binary with a new version containing
       the new statically-linked object module.	 The build process tells you
       how to do this.

       There is a gotcha, however, which users usually encounter immediately
       they respond to CPAN's invitation to "install Bundle::CPAN". When
       installing a bundle -- a group of modules which together achieve some
       particular purpose, the installation process for later modules in the
       bundle tends to assume that earlier modules have been fully installed
       and are available for use.  This is not true on a statically-linked
       system for earlier modules which contain XS code.  As a result the
       installation of the bundle fails.  The work-around is not to install
       the bundle as a one-shot operation, but instead to see what modules it
       contains, and install these one-at-a-time by hand in the order given.

AUTHOR
       Dominic Dunlop <domo@computer.org>

DATE
       Version 1.1.0 2004-02-13

perl v5.10.1			  2009-02-12			PERLMACHTEN(1)
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